Natural Gas to Power Pickups

U.S. auto makers are introducing pickup trucks powered by natural gas as they look to catch the growing wave of interest in the fuel as an alternative to gasoline.

On Tuesday, Chrysler Group LLC plans to disclose it will build the first production-line pickup truck powered by natural gas. The auto maker is promising to build at least 2,000 heavy-duty Ram bi-fuel trucks that run on a combination of compressed natural gas and gasoline...